Latest TCS Aptitude Question SOLUTION: The total number of pupils in three classes of a school is 333. The number of pupils in classes I and II are in the ratio 3 : 5 and those in classes II and III are in the ratio 7

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The total number of pupils in three classes of a school is 333. The number of pupils in classes I and II are in the ratio 3 : 5 and those in classes II and III are in the ratio 7: 11. Find the number of pupils in the class that had the highest number of pupils.

Asked In TCS PARUL JOSHI (9 years ago)

Unsolved Read Solution (7)

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Read Solution (7) :

srikanth  (9 years ago)

class III has highest students = 165.
classes I:II =3:5 .........(1)
classes II: III =7:11........(2)
in above two ratios class II is common. so
we multiply equ1 with 7 and equ2 with 5 then
classes I : II=21:35
classes II : III=35:55
ratio of three classes is 21:35:55
we need highest students of class (333*55)/(21+35+55)=165

Is this solution Helpfull? Yes (23) | No (1)  

vikash  (9 years ago)

The answer is III class the number of pupils is 165...

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vikash  (9 years ago)

in class 2 ..i,e - 208.15

Is this solution Helpfull? Yes | No (2)  

ravi ranjan  (9 years ago)

let the no of students be x,y,z;
x+y+z=333;
x/y=3/5; and y/z=7/11;
y=5x/3 and z=11y/7=11*5x/7=55x/7;
putting in above eqn
x+5x/3+55x/7=333 and x=63;y=105 and z=165;

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Chirag Ranjan Lahiri  (9 years ago)

165 will be the ans...

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Sabita Mohanty  (9 years ago)

the class is III
I:II:III=21:35:55
I=(21/111)*333=63
II=(35/111)*333=105
III=(55/111)*333=165

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sneha  (6 years ago)

1+2+3=333
1:2=3:5 2:3=7:11 to equalize 2 multiply 7 with 1:2 and 5 with 2:3
1:2:3=21:35:55
111-333
55-? 333*55/111=165

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